Thomann DB for Orchestra

Hi there

Im from Costa Rica, and i play in a orchestra but i don't know what Double Bass wold be better for orchestra work

Thomann 2W BW TN 3/4 Double Bass EU

Or

Thomann 44 3/4 Europe Double

Or

Thomann 3BW W 3/4 Double Bass EU

Hybrid Thomann (Strunal) are better than fully carved Thomann (Hora)?

I'm a advance player but still a student, so I do not have much money to buy a more expensive Double Bass

Sorry my bad english is not my mother lenguage.

Thanks to you all.

PD: The Thomann 2W BW TN have a flat fingerboard? Like a electric bass? I've never seen a double bass like that, Or I'm not understanding well what means flat fingerboard...

Thanks again
 
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