minor things worth replacing/ buying in a dc5r?

[Nepolian]

1. Dc5r stock head unit?? it looks so plain n low on features (e.g. Ipod dock, eq,etc) replacing it with alpine/pioneer Head Unit only would improve the sound or anything at all? Even if its still with the standard speakers/tweeters?

2. Muffler?? since im a cheapo, cant afford/dont want to buy the whole exhaust system (as mentioned i want minor ug @ limited budget), i only want the muffler for better wow factor/sound/rice...is it worth it??

3. HID?? 6000K..I dunno why but it just looks better with hids...is it worth??
.

1) Aftermarket h/u would still improve sound quality, even with stock speakers.

2) Why not, will sound better and improve performance a lttle.

3) Go for it, everyone else does!

[Zinyo]

thanx for the advice guys;
what would be better...pioneer hu or alpine??(the one im looking at jb has the alpine hu for $298 n the pioneer over 300...) is it hard to diy change/replace the hu in a dc5r as jb hifi charges $80 flat rate for installations...
Also, any suggestion on any good mufflers to buy (NOT loud, decent perf/price, good sound...) and where to buy it in melbourne?

Thanks