Thank you (and All4Fun). Sorry to hijack the thread, too, OP!
Right now DS is in a Britax Marathon and an Evenflo Triumph in the two cars. He is about to outgrow the Evenflo heightwise, but should have ~1 more year on the Marathon. He is 2 years old (today!), 38.5" (tall torso, "regular" length legs) and 34 pounds. We are also expecting a second child who will likely be ready to use the Marathon in a year or so. We would like to get a 5-point harness seat that will later convert into a regular booster. Our cars are not very big, so we'd rather not get something as large as the Britax Regent, though we have thought about getting another Marathon to last him for one more year before buying something else.
The only combination seat that currently goes past 40lbs is the
Cosco/Safety 1st Apex HERE It harnesses to 65lbs, 17" top harness slots (about the same as the Marathon's) and then converts to an OK booster seat. It has nice open shoulder belt guides however parents who have used it as a booster seat have noted that the width of the seat can make it very awkward for kids to buckle themselves in, unless it's in a bucket seat (like in a minivan, for instance). Also, this seat
requires a tall seatback &/or adjustable headrest behind it - the seat is outgrown by height once the tips of the ears go past the top of the vehicle seatback/headrest. Also, this seat is just a little bit smaller than the Britax Regent, so size wise, it doesn't sound like what you want.
I really don't want to recommend a 40lb limit combo because it doesn't sound like it will last you until age four w/the harness (bare minimum recommended booster age). If you wanted to look at those though, the only two I'd recommend that make good booster and harness seats are the
Recaro Young Sport ($250) and the
Evenfo Generations/Bolero ($90-110).
I'd actually recommend getting another higher weight limit harness seat
The ones I'd look at are the Sunshine Kids Radian (65lb limit, 18" top slots), another Marathon, or a Regent (20" top slots, will last the longest) or if you can wait, Recaro is coming out with a new convertible seat that will harness to 35lbs r/fing, 70lbs f/fing, 19" top slots, cost $219 & 259 depending on the model (one will be basic like the Marathon, the other will have SIP "wings" similar to the Britax Boulevard). ETA: these are scheduled to arrive on the market in June/July. Here's a site that is preselling them:
http://www.proamauto.com/recaro_como_seat.htm
HERE's a thread with a picture of an 8yr old in a SK Radian someone posted just today on the BBC car safety tips board.
Pics of the Regent and Apex side by side HERE.
hth!