Phillybaby,

DR is looking for a LESS COSTLY alternative to a Webra .50.
Your suggestions of the West Eurotech and the OS.50SX are disregarding this exact problem, being still (much) more expensive.

As Adrian suggested, at $100, the Magnum/SC/ASP/SY .52GLS is a good possibility.

I believe the Tiger Shark is not as powerful as the above and much heavier than the Webra.
It is cheaper, though, as is the TT that is not in the same power league.