morihuel, keep on Spinning! I have been Spinning for 4-1/2 years, and I understand that is is a whole lot more than just spinning away your time. I also ride a road bike because I love being outdoors on my bike. There is definitely a place for both, and there is no reason not to enjoy an intense Spin class on one day and then do 20 miles of rolling hills the next, voila, best of both worlds. I even have my own Spin bike at home (NXT Johnny G). As for shoes, I think any clipless shoes are just fine for the Spin bike. They are definitely better than using the toe clips, but it is not necessary to have the most expensive ones out there. For the road, you definitely want the best ones you can afford, for all the reasons that aharris expressed, power, ventilation etc. Spin on!!!