I have ridden 26", 27.5" and 29" wheeled bikes, both HT and FS. I also ride road. Unless you get into jumping off drops or hucking big air, you'll be fine with only 100-120mm of travel whether you go HT or FS. This would be more of a XC bike. I've been on a Kona Hei Hei Supreme for about 4 years and love it. It covers my needs for both racing and trail riding. I pretty much keep it on the ground except for mild drops and rock gardens, so 100mm of travel is fine. I run a dropper post, too--helps on steeper, technical stuff.