Just save up and get everything that you want because you will never be happy with 2 mods. But the first 2 mods should be gen dial/hands or relume dial and hands. Next bezel then crystal
seriously though, lume and AR are pretty much the way to go for instant gen looks. The funny thing is someone mentioned elsewhere and it's probably true that even though it's the smallest part, when familiar with the pearl it becomes one of the biggest gripes that you can't get out of your head until it's corrected
In terms of budgeting mods you are better off doing crown/tube/dw, they are the cheap worthwhile mods, and then getting a Wiz relume of dial/hands and stick in a sunnydale crystal (which are out soon) in and it will look and feel great.
I was wondering this as well... it looks like the cost of buying and installing gen hands is cheaper than reluming them. Plus the gen hands have just a slightly finer quality of construction, and the lume on them is gen so it's already to notch. Generally a better value for your money, I'm guessing...
I would do a relume, sunnydale crystal, gen SEL this part bugger me the most, in the 5GPO there is such a gap between the sel and the first link that brrrr, that's just wrong, of course gen bracelet would do... I haven't done any of this as my PO has a 4813 so is not wort the investment me think...