This is what i have done, the prices aren't current as some stuff was bought back in 2002/2003 and even some of the more recent gear like the ratios & sye that i bought from wooders sat in the shed for 8 months before i got around to getting them installed. However this is approximately what i have spent since i bought the jeep 7 years ago:
1) 4x near new OME 2.5" coils $400 - Ausjeep For Sale Forum
2) 4x Rancho 9000 shocks $600 - TW USA4x4
3) 1x Rear trackbar relocation bracket $15 - ARB
4) 4x 31" Goodyear MTR's $900 - Dunlop tyres southside
5) Rock Sliders $300 - Jbitz
6) ARB Air compressor fitted $260 - Westside 4x4
7) 4.11 ratios & front air locker fitted $2400 - Wooders & Westide ARB
8 ) RE Rear Adjustable upper arms $120 - Wooders
9) SYE & HD Shaft $900 - Wooders
That's $5855 so it's a tad over but you could always swap the SYE & HD Shaft for a T-case drop kit which i previously had which cost me about $55. That would make the new total $5010.
The best part about having the ratios is that any driveline/clutch shudders from take off are gone, any speeds above 80klm/hr requires 5th gear, hills are no longer an issue and it tows great. Last week i towed the camper trailor (700kg) for about 400klm and the jeep returned 13L/100klm which is better than when it was on stock GSA's not towing. The locker has come in handy a few times and last week when we were on our own in the bush and became stuck towing the camper, one flick of the locker switch and we were out of trouble. The rock sliders have also come into their own, particularly on occasion when i followed jimmyb offroad
cheers