Welcome to the forum mate

Where about you based?
SRi+TIP (any of the metal selection rather than silicone)
HPFP
Cobb V3 or Versatuner
REM (AWR imho)
Thats yer started for 10, once youve got that then give justin on here a shout (DJJUT) he's pretty much the best tuner in the UK for the MPS platform

Should you come to sell you can uninstall the cobb and sell on seperatley, the Versatune is unfortunatley locked to the car. Just in case you were wondering the difference

For suspension go with the H&R Springs and the Bilstein B8 Sprints, Amazon for the springs and eBay for the shocks. Alloy upgrades, the Rx8 ones are very popular, fill the arches nicely and are pretty damn cheap.
Oh...
Pics?!?!?!?! :p