I LOLed at the Engl 840 also. He is looking for AFFORDABLE, not a boutique grade power amp right now.
I personally would pass on the Carvin TS100 unless you want a really pure power amp and if you are going for a tight aggressive metal tone (which I bet you are with an e530) I would invest in something else. Pretty much all your tone will be coming from your preamp so you will not get much aggressiveness or low-end from the TS100.
A lot of people like the power amp to add a certain signature tone additive to their sound. For example, Mesas 2:100 will add that Mesa Recto sag (more so with Modern engaged) or VHTs series to have add a tighter and less saturated output.
The Peavey Classic 50/50 is a fantastic power amp if you can find one and they go dirt cheap and will compliment a "budget" metal tone nicely.
If you want to go even cheaper, get a Rocktron Velocity. They are solid state, but they are really underrated and have awesome performance especially for their price! I bet you could find one used barely over $100. If you plan on gigging with it then get the 300 model. If you are just going to be using it for bedroom jamming or with a friend, the 100 will be more than enough.