I have the latest Liteway, not the newest one that accommodates the infant seat, and I've been very happy with that for DS. He's 32 lbs and almost 3 years old. HOWEVER, I'm still getting a Joovy Caboose stroller that has the sit and stand on the back for DS and the seat in the front, which also accommodates the Chicco infant carrier instead of a huge, bulky, heavy double stroller. DS would probably much more prefer the sit and stand part rather than the stroller seat, and LO will only need to be in the infant carrier within that stroller for a short period of time. I also still have my travel system stroller, just in case.
ETA- I'm meeting someone today that has the Joovy almost new from Craigslist. I definitely think Ssecond hand is the way to go if you can find what you want!!!