New (or Improved) Budget

I can hardly believe it has been all the way since June 4th that I last posted! Yikes!! Things have been so crazy with moving, though I'm almost settled now (almost being the key word) in the new place, and the old we just have the walk through tomorrow with our landlord. It's super clean but I doubt that will help them- they've only had one showing since they put the rent sign up 2 weeks ago.

I also took a look at my budget thinking that moving is a good time to do some rework on the darn thing. Most articles use budgets of percentages whereas I've just been trying to spend a set dollar amount or save a certain amount, and I'm hoping this new plan will keep me just a smidge closer to sane.

(Deep Breath)... Here goes...

24% Taxes/Unchangeable deductions (medical, dental, FSA- stuff I can only change once a year)
20% 401(k) Contribution
15% Rent (includes utilities)
10% Long Term Savings for a home, retirement, etc
5% Short Term Savings for 'sometimes' expenses like car insurance, vacations, weddings, etc
8% Roth IRA Contribution (which requires me rolling the thing over to a firm that doesn't stink)
18% Other spend including groceries, gas, and fun money

The hard parts are the Roth and the Long Term Savings. I've set up the 5% to come from my checking to my savings and I'll reroute when I need it to pay for these things, but the 10% I need to find something solid and looooow maintenance to put it in. I'm thinking index funds, but to go with ETFs or Mutuals? One that follows S&P or two to three to cover different spectrums? I've read up some, but it's so hard to pick what is best with the fees and everything. As for the Roth I just need to roll it over, the people it's with now don't have an office out here, and I don't like them anyways.
Not to mention sticking to the budget. That might not be a walk in the park, either.