I'm a little late in responding, but here's my $ .02.
About a year or so ago, when my son was almost 4, I did an EXHAUSTIVE search for a stroller to accommodate a larger child. He was both tall, and heavy, but we still appreciated the luxuries of having a stroller... My son would still occasionally fall asleep in the stroller, so I wanted the seat back to be high enough so that his head wasn't falling off the back, and it needed to be wide enough to be comfortable for him. And it had to have a higher weight limit.
We, my son and I, visited many stores and physically tried MANY strollers. I also searched online and even went to the extent of narrowing my selections down to my top 8 or 10 models, and CALLED THE MANUFACTURERS to get the exact dimensions of the strollers, including the seat height off the ground, the seat back height, and the seat depth and width. Yes, I'm a little OCD. But the way I saw it, if I was going to spend the money to purchase another stroller with the intention of getting the maximum bang for my buck and the most possible usage, I needed ALL the details.
With all that information at my disposal, we decided on a Maclaren Triumph. The Triumph and the Quest are similar, with the Quest, I believe, being slightly more posh, but not much. I considered the Maclaren Quest, but ruled it out due to an overhang on the front of the seat that I thought would leave less room for a larger child's feet/legs to hang down and rest on the foot rest comfortably, so I opted for the lower model, the Triumph.
And we LOVE it. My son is now 5 yrs. old, 49 lbs., and I believe 44" tall, and he still sits comfortably in it, and it steers like a dream. It's weight limit is 55 lbs. so it it'll last for a while. It comes with a 5 point harness, but we removed all the buckles, as my son didn't need them at this point. It has a carry strap, multiple seating positions, and it's easy to fold. It's handles are high enough to be pushed comfortably by a taller individual, as my fiance pushes it with no problem. It does have a basket underneath, and I purchased a cup holder to attach. I also have a snap on tray from our older BabyTrend stroller that happens to fit exactly on the Maclaren, so my son does have a tray for his drink, etc. I know you said you aren't worried about this stuff, but I just thought I'd mention it. Overall, the Maclaren Triumph is the BEST option we found for a larger preschooler.
Here is a link for a model that I found on a QUICK search that is $119, with free shipping... I'm sure there are other similar or better deals out there (i.e. last year's colors), there was one on this same site that was $109, but it was pink.
http://www.albeebaby.com/maclaren-triumph-stroller-forest...
Hope this helps!!!
Let us know what you choose!