When I sold my Boxford AUD not too long ago I was looking for a geared head lathe from either Warco or Chester. You cannot ignore the fact that the Chinese offer a lot of machine for not a lot of money.
My choice narrowed down to picking between the Warco 1236 model and the Chester ( more local to me ) Crusader Deluxe. Both 300mm swing plus for gap bed removal. At the time both had similar price tags and had DRO's fitted. The Crusader Deluxe is more expensive now.
I chose the Chester Crusader Deluxe, mainly because of location and which I almost bought.
In the end I finished up with a late model Harrison M300 which my local machine tool dealer ( who I had dealt with for a long time ) had just got in stock and did me a great cash deal.
My initial choices were based mainly on two factors, the gap bed removal, they had DRO fitted and decent bed length.
When you look at the GH550 spec, it seems to be really quite light at 300kgs. I Think my Boxford was more than that on its very robust cabinet. Seems too light for its capacity.
Personally if your funds would run to it and you could accomodate the size the 1236 would be my choice from the Warco stable. £700ish more gets you extra diameter and length capacity plus fitted DRO. Its also a more substantial machine and almost double the weight of the 550. I have seen both the Warco 1236 and the Crusader deluxe and they were very similar, however not actually seen the 550.