You might consider "testing the water" at 50 to help assess how ready or not your game is to move up. Just play one table at first (and none at your usual 25 lvl) so you can direct your entire attention to getting a feel for the game and the opponents at 50. If and when you feel comfortable, you can start adding tables. If you feel meaningfully uncomfortable because you're game doesn't seem up to snuff, you can always try again after you've improved. If it's due to having more money on the table, you can set up a program of exposures to desensitize yourself.