Got a K2 fan here, don't we. That comp set alone will blow 2/3 of our friend's budget. Don't la poison people like that, Ichiwan ..
With that budget, a simple SQ oriented system is possible ... plus or minus about RM 500.00. Let's see what we can do here ...
HU - maintain stock for now
Front comps - since we cannot afford fancy kick panels/etc, let's get a decent pair of 5.25 inch from reputable brands like DLS, Focal, Eton, Alpine, CDT and etc. Avoid brands like Caliber, Sony, Mohawk and etc if you're serious about sound quality.
Sub - a small 10 inch in a sealed 1.0 cft enclosure will do. Or opt for a quality bass tube and save some boot space.
Amp - For now, let's get a decent 4 channel amp with atleast 50W x 4. These are TRUE RMS wattage here, not over hyped 400W PMPO crap that you get from some brands. Suggest you let 2 channels to take care of the comps and bridge the other 2 - shud give you about 200W x 1 to drive the sub.
Spare about 10% of your budget for quality RCA's, speaker and power cables and instalation cost. Quality install and tuning is the thing that will make your system good or bad. No point in stuffing a bootful of hi end ICE gear when the installer has got no clue on how to maximise them.
Did I miss anything else, ICE Meister ? Your humble Padawan Learner signing off !!! Hahahahahahah !!!
P/S - WJ, nice JL sub you've got there. Is that a W3 or W10 model ? Yummy !!!