All 3 of your suggestions sound like things you could do when they break or wear out.
I really really wouldn't go from Juicy 3's to Juicy 5's though. The only differences a few grams in weight, the 5s get 2 lever clamp bolts instead of one, the lever will click forward of its normal position. Newer juicy 5's (the black reservior cap ones) seem to come supplied badly bled too. I now 3 people with them and all 3 have been bled terribly
Tora SL to Recon SL is a few hundered grams. If you are going to spend £xxx's on forks I reckon you need to get at least RS Reba SLs, that way you'll drop a significant amount of wieght and get a better performing fork
Get an SLX triple chainset if you wish when you need to replace you chainrings and ideally you bottom bracket as well. You can get a 2010 deore for £50 which I assume has hollow arms (like SLX) unlike I assume your forged arm pre 2010 deore cranks. SLX is more like £90
Spend £120 on clothing or something