For me the Volo has been wonderful! Its very light at around 7 pounds. When traveling it makes a huge difference to have a light stroller - going through metal detectors, folding it up before boarding (one handed - so grateful), loading it in the car at my destination along with all the other luggage. Its been scratched up a bit but because its well made its been able to withstand it (2 trips to France, 2 trips to LA, Germany...) I bought it at BRU with their 20% off coupon and it came to around $90. Expensive but a great investment. Its also my stroller for the car when going to the museum, zoo, etc. It fits nicely in the back of my Toyota Matrix.
When deciding I also found the Chicco C6 stroller which was like the Volo in many ways, got great reviews and was cheaper at $60 ($50 after coupon). But I opted for the Volo because I knew I would be using the stroller a lot so I paid the extra money - it really worked out well. Its bare bones, but that's all we really needed. For me it was about being light and functional. My 18 month old can sit somewhat upright. There is a bit of a recline (30-45 degrees?) and its not adjustable. I haven't had a problem with her not seeing all the action or wanting to sit straighter.
I would recommend going to a stroller store and getting a feel for the different strollers. Sometimes when walking my feet would hit the stroller or the handles were too low/high. You can also sit your son in it and see how he likes it (if he is uncomfortable, pitch, etc.) It helped me in making my final decision.