Another "moving up" question

[A_Junglen]

Well, I've been playing the 20-2's on Party, and 15-1 on stars with a lot of success lately. Below are my stats..you don't have to tell me it's a small sample size, but hopefully that doesn't make them completely irrelevant. Anyways the other night I won $2.2k in MTT's (1st in a 5.50 with 1545 entrants, and 2nd in a 10-1 with 176...also q'd for the 500k, and had a smaller cash in a 20-2). Before this my bankroll was around $1k...now it's over $3,000. So I'm trying to get opinions on whether or not it'd be wise to move up to 30-3/50-5's, (or even the 55-5 on stars). I was thinking maybe I'd try a few and if I whiff'em I could still move down and crush the 20-2's.

20-2 stats.
ROI 77.7%

ITM 54.5%

Total Tourneys 44

1st 20.5% 9
2nd 25.0% 11
3rd 9.1% 4
4th 2.3% 1
5th 6.8% 3
6th 11.4% 5
7th 0.0% 0
8th 11.4% 5
9th 9.1% 4
10th 4.5% 2

15-1's.

ROI 39.7%

ITM 46.9%

Total Tourneys 32

1st 15.6% 5
2nd 25.0% 8
3rd 6.3% 2
4th 6.3% 2
5th 9.4% 3
6th 25.0% 8
7th 3.1% 1
8th 6.3% 2
9th 3.1% 1
10th 0.0% 0

Again, I'm well aware this is an incredibly small sample size, but I would hope they would at least give you an idea of where I stand. Thanks again.

EDIT: Everyone suggests multi-tabling, I'm currently 6 tabling.