Welcome fellow Irishman.
You are going to love the 05 if you get it. With the GXP front and rear fascia'* and without all the extra side cladding that is standard on the 00-04 SLE and 00-03 SSEi'*, you WILL stand out from the rest of the crowd. At least with the SLE you won't be as disappointed power-wise as is common with the GXP (which should be rated with another 40-50 hp to compete with the Hemi 300C, and have 60-70 to really compete at the track).
Also, with the L36, there is A LOT of knowledge out here on the net, and if you're into modding -there'* a surpisingly large # of mods considering it'* a 4 dr with a 6 cylinder engine.
Also, what color are you thinking? May I suggest Pearl White?