Only two exotics brands make any sense today IMHO. Get a Murci or V-12 550 or 575 F.
This Saturday the local Porsche dealer is unveiling a 997 tt coupe, 3.4 sec. 0-60 mph w/tiptronic. I'm not sure of any schedules on it around your part of the states. I already put my order in for the 997 tt cab, to be released next year. There is also the new GT3 911. Did you know Woodhouse has a Porsche dealership, I'm sure everyone knows that?
S/C or tt the SRT coupe you have or for 30-40K you can get 650+hp from a 996tt (base car not included). Else you are taking a chance on production like kits with too small numbers produced to have any viable dealer/mfg. backing.
IMHO, if you're looking for HP/TQ and $'s, the best choice is the Viper, and I have both a 996TT and SRT-10 Paxton. If you're into tracking, those are your choices if you need reliablity besides 195+ mph. Good luck, I hope everything works out for you from here on in.
Larry