I know the feeling. I was also debating buying S3s but now holding to see what happens. I'm still mining with 8 S1s and they're down to pulling in about 1 BTC a month. At my electricity cost of $0.13/kWh this cost me about $340/month. So I'm still making a small profit at the current BTC price. May upgrade using the kits, but not worth it yet. Waiting to see what happens.
You really need to look at the pencil mod of your S1's I did my 9 miners and now they mine at only 140GH but use @ 200 watts less apiece. So now my electric cost (.125kw) is about .51 day each. You will make more profit doing so. Then this also freed up PSU to run some S3's
Not sure what you mean by pencil mod? I guess you mean lowering the frequency. I'll PuTTY in and try that. Thanks for the advice.
It's this - https://bitcointa.lk/threads/guide-undervolt-antminer-s1-1-19w-gh-at-the-wall.286480/
I've done it on my S1, works great. As aurel57 mentioned it'll increase your profit margin