Bullets needed to be bit as I was in definite danger of either blowing a large amount of ££££ on a big model or stalling the project, so I decided to go with the Foundry Hydra. In reality it ticks a lot of boxes, being nicely detailed, no legs, and reasonably priced. What it lacks is size, but size isn't everything. I ordered it at the same time as the "Medea" pack so didn't incur any additional postage and it cost a tenner.
It's a nice model, but a bit of a bitch to assemble - main body, tail, two neck groups and seven separate heads. There was some rather big gaps after assembly and lots of filling needed, but the end result is "not bad at all"