we've got a few year old pioneer in ours, and i think it looks fine, no chrome bling, just black fascia and red illumination that matches the dash etc pretty well.
Jcb: It turning off with the ignition doesnt mean it has ignition live. Its more liekly its sent a signal from some ECU to tell it youve turned the ignition off. The fact it will turn back on tells you its running on a permenant live.
Diesel, if your ever round this way, swing by and you can have a listen of ours. The only part i;ve not finished is my sub controller. I find that the sub sometimes becomes too loud due to the way some tracks are mastered, and in the old car i'd knocked up a bass controller that sits in the pre-out line, and allows me to adjust the sub level from the front. Some head units have this option built in, but mine doesnt.