well... koni does make shocks for the camry. if i remember correctly, they are for the gen 3 models (92-94) for the servicable strut models... on a general sense, i heard koni are kinda rough but are overall a good bargain for the money.
Koni in general is a well respected company with roots in Racing.. I would feel confident purchacing these over several other brands..
Koni yellows are the adjustible version... I've never tried them on a Camry, but on the Prelude they are very well respected, and are often the shock of choice if a full coilover for some reason cannot being considered..
Personally, I would choose Koni over Tokico any day, but be aware that these are quite stiff, they are not a "comfort-damper"
Does Tein make a Camry application? They are a full coilover but one of the best setups I have ever tried (again not on a Cam but all things being relative I would imagein they would be excellent on any car)