SAAB Performance gods...HELP!
 

OK SAAB enthusiasts... I need help. I just bought a 2002 SAAB 9-5 linear (which I LOVE) but I'm a performance and speed nut. Please advise on the best/least expensive/reliable way to boost my overall performance (and provide links if possible). I've been viewing eBay and have found several items from blow off valves, to cold air intakes, to even intercoolers. The truth is, I've been an RX-7 nut for the longest time and I'm on unfamiliar territory right now. Advice?? Best bang for the buck!

Thanks!