First car I spent serious money on was my 05 Mustang GT vert (blown, etc). It motivated me to "improve" my WRX.
All told, I started slow...
'89 Ford Escort, (used, ended up burning to the ground)
'96 Mustang GT, (seemed fast, was actually S L O W )
'99 Mustang Cobra, (what a fun car; loved setting off car alarms with it)
'02 WRX Sedan, (Cobb Stage 2, suspension, ASA wheels; loved it, had to give it to my dad)
'05 Mustang GT vert, (Saleen Supershaker, suspension, plus other goodies *still owned)
'08 BMW 335XI, (stock, LOTS of fun and super smooth to drive, especially in Germany, traded it in for
'10 BMW M3 Sedan, (its everything they say it is... nicest driving car I have ever owned *still owned)
'12 Mustang Boss 302, (3 weeks old, just activated the Trackey and it is fantastic to drive *still owned)
Ok, so WRX is gone, but not forgotten and definately loved. Given the space (and wife's permission) I will get another... maybe after I retire in a year and a half.
edit: A pic of the new kid