Whatever you do, don't go paying anyone 2000Eur to do your accounts! There isn't much to be done and if you do alot of the work yourself like keep good excel sheet logs of your expenses and receipts, you should be paying more like 600 a year.
What others have said is correct, any accountant can look after you - just because its aviation, its nothing that out of the ordinary. In the UK I think Self Employed is the easiest option by far and much cheaper/simpler.
Just get a decent accountant that's good at making your "company" keep making losses and you're sorted!
For what it's worth myself and a few others were recommended McNamera & Associates and found them to be very difficult to get in touch with - maybe OK if you live in Dublin but I use someone local to me.