My comments on another thread probably are as much or more appropriate here! The Flexibility in Sizing thread.
@Isa Absolutely be content with what you have! (Until you’re NOT!) I rode my '98 Klein Mantra into the ground! And loved it the whole time! For 15 years or more! Upgraded step by step from 80mm fork until the last one was up to 150mm, and it rode better with every increase! I rode its “twin” '99 frame that I bought for another 2-3 years, till it also died. I still have both, even though frames have failed.
The Blastberry Chameleon color on the '98 was WAY ahead of its time, Gary Klein was one of a kind, and built only amazing creations. My current Trek Domane in “Purple Phaze/Anthracite” is basically a revival of that original changeling color scheme. I couldn’t possibly part with that Klein Mantra frame. I might even tell my wife to bury it with me because no one else will EVER appreciate it like I do!
@dmgadry61 My having just barely entered the “gravel rides” arena might be useful for things you might consider. I bought an identical wheelset for my Domane, the Bontrager Aeolus Prov 3V wheels, which have an internal width of 25mm, so they are ideal for gravel wheels, allowing a larger profile for tires that typical road wheels. I run Continental GP5000 tubeless on the originals that came on the bike, and I chose the Tufo Speedero 700x40 tubeless for the gravel set, and am extremely happy with those thus far. They roll almost as fast as road tires, but are much better than road slicks when I get on gravel or dirt. I’ve done some pretty wild stuff on them and have been amazed a how well they’ve held the surface and also held up without any flats and show very little wear after almost 300 miles. All that could change on the next ride, but I hope they will last a LOT more miles and not leave me stranded and walking.
I think you need to consider most how much you will use the OTHER bike, if indeed you get another. If you really WILL use it a lot, and if the resources are available to invest, I wouldn’t even think twice about switching wheelsets out, like I am doing. I did it because I knew I wanted to make some connecting routes that my road tires weren’t fit for, but I did not feel sure how OFTEN I would do these gravel or gravel/pavement rides, and I don’t feel ready to put enough money into another quality bike purchase right now. I may never.
But I have quickly learned that gravel is MUCH harder on your drivetrain than road riding is! Far more dirt and grit gets tossed up onto the chain, cogs, crankset, not to mention the rest of the bike AND you. You and most of the bike frame will handle it okay, (though rocks can certainly take a toll on either.) But the chain and cogs are going to need a LOT more attention and maintenance.
That alone has me already thinking about just how little money could I put into a dedicated gravel bike and still be happy? That would mean no switching out wheelsets, chain (it takes another few links for a larger cassette), and making adjustments to the B-screw on the derailleur each time (and POSSIBLY to the disc calipers if they decide to whine a bit about perfect alignment.)
I can manage these things now by choosing to go gravel for a spell and then return to road, but I wouldn’t put up with it if I were going to change every couple rides or so.
As a result, I’m probably going to end up going to another dedicated bike for gravel SOMEDAY. I’m retired already, and it will be a well-considered decision that hopefully gives me MANY years of use from whatever bike I may choose. Just as I hope my Domane is my road bike for a LOT of years to come!