Thanks guys. I am actually booked onto one of the mantas for the next long weekend and everyone speaks very highly of them, so really looking forward to that. However, in the current economic climes i cannot afford to go with them every month, so was looking for more basic options!
Went to p. aur last weekend by coach/boat, which was great, but it ends up being 16-18 hours of travel for 36 hours on the island. A great time, but not sure my body can take it every month as well.
While i obviously like the luxurious approach, what i really like is being underwater. I guess a mix and match of luxurious and basic should allow me to get my nitrogen fix over the coming months!
Thanks for the help guys.