Feeling sick but he needs a new seat.

The sunshine kids monetery is latchable. The britax parkway SG doesn't latch, but it has an anti-submarine clip that may give you peace of mind.

What is your budget?

We're trying to stay under 100. It may not be reasonable but we're tight right now especially with baby on the way.

The high-back Graco Turbobooster is not a booster that's used with LATCH, but it is a good safe booster for a child who's the right age and size, which it sounds like your DS is. And it's definitely under $100-- we paid $50 for ours. Plus, it converts to a backless booster later on, when your child is ready for a backless.

Well.... if he still fits in a triumph adv(really? lol) then he must have one short torso..he must be ALL legs. My 43 inch tall daughter can not fit in a triumph adv!! So...given that he fits into a triumph adv, you actually COULD buy him a harnessed seat that will last longer, if you wanted to...The graco nautilus would hold him for probably at last another year....but really, unless you, as his mother and the person who presumably knows him best in this world, truly feels like he does not have the maturity to sit properly in a booster, it's likely not necesary. The turbo fits kids well and is very cheap. It;'s a good choice. The recaro Vivo is also a good choice, and works especially well for tall, skinny-minnies, so it might be great for you as well, it's also in your price range. The monterey is latchable, although sometimes it doesn't fit skinny kids the best, because it is very WIDE.
really, what is important is that it gives a good fit.

Don't a lot of LATCH systems have really low (like 40lbs) weight limits anyway?

LATCH on boosters just holds the seat in, not the kid, so the weight limits don't matter.

-Angela

Why would you want LATCH for a booster, besides to hold the booster when someone is not in it? Is there a benefit to the child? My 6.5yo is in a fisher price booster that is not latch, just wondering if he is missing out on some benefit, or if it is just a convenience factor

At 6 years old a booster is a perfectly appropriate choice for children with no developmental delays or special needs, it's OK Mama! It might be difficult to find one with LATCH, but the use of LATCH and boosters is a relatively new thing without alot of proven benefits. I would not be stressting about it. My 6 year old DD rides in a Recaro Vivo, a Graco TurboBooster or a Britax Parkway (the old style) and none of those are LATCHable, but the fit is good! If you are on a tight budget, I would look at the TurboBooster. Easy to find, fits most kids well, back is removable for later on, comes in some cool patterns (LOL!). It's probably going to be the most cost effective option.

Really though, it's OK! And it is much safer to have your 6 yo in a booster than in a seat they have outgrown by height or weight, which could cause the seat to fail or not adequately protect your child in a crash.