has the ibanez got a 5 peice or 3 peice wizzard neck im reading different facts on the net. And how well will the edge pro stay in tune
The Ibanez RG1570 has a 5pc Wizard maple/walnut neck.
For the rest of this topic. Take Tim's recommendation over any other.
The whole custom guitar decision. You're pretty young, and stereotypically putting it, you don't know what's the best out there. So, in my opinion, I wouldn't go for a custom. For me, I went from a Stratocaster copy (good God those were the bad days) then to my Indie, which in money terms was fair.
Now with current prices your Iommi SG is ~£350
In this topic you're thinking of a custom guitar, which is ~£1500-£2000
Bit much?
The RG1570 is, in my way of thinking, just at the top of the band of guitars that are for you, it is ~£500. However, I think you need to set your standards before picking ideas out of thin air. Yes, the first option is that it has to be left handed but there are Jacksons, Ibanez', Deans, etc.
Prefer thick necks? Thin necks? H-H configuration? H-S-S? There's a lot and I feel you haven't said everything that could be helpful. As well as you commenting on that a longer scale length seems better for you, even though it's 0.75" difference I think neck profile is a bigger issue. Breaking down your first post, it would be:
"I want a guitar for the summer, I'm looking at a Ibanez RG1570L. I want BKPs too."
You'll need to say more. I think you have the EMB (Expensive Means Best) syndrome.
There's my two cents.