I think my dry British humour may have been lost buddy, didn't mean to come across as having a go.
Must be because I'm French
Read Snowolf's review of the cobra, it's very detailed and there are 31 pages of discussion in which that board is compared to a bunch of others (including the SL).
It sounds like you already have a park board (Evo) and a freeride board (TFA).
If you want something in the middle go with the SL. The Cobra is more freeride oriented.