Need some ideas on replacement seats

Ok guys, here's the deal.

I have a 99GT, and really like the car, but I find the stock
seats to be a bit on the uncomfortable side, since I am tall.
The seat backs are just not high enough for my shoulders.

I would like to have a set of Recaro seats or the like, but since
my car does have the power drivers side option, will I need any
special adapters or anything ? Also, where are some good places to
shop ?

Thanks,

Scott