Ignore comments on weight and the usuall “you can use your 2mm travel HT” or the “I use my 1 inch travel HT in Gnarr British Colombia” if someone else can huck 30ft on zero travel, good luck to them… ride what YOU want and feel comfortable on!
If you already have another xc / am bike then get what you want for the job. If you want a DH or FR bike then shop about, you can easily get something very nice for 2k, it depends if your buying new or if you would go 2nd hand, either way it is a buyers market.
If you know you like DH or FR then get the best you can 1st, if your not sure then get something more budget.. but I guess either way you can sell it if you don’t like it. Up-Market DH I would look at Demo 8, Giant Glory, Intense socom, Iron Horse Sunday (Older one with DW Link).
Freeride a demo 7, Intense Uzzi, Commencal Furious, Transition Bottlerocket, Foes etc
Stinkys and big hits will do the job but they are heavy and may quickly want something a bit nicer (nout wrongwith them but most of us on here are bike tarts!)! Have a look on http://www.southerndownhill.com for some good advice.
You may find a full DH bike fun but many people change them pretty quick as they are a bit specialist, unless your racing DH I personally dont see the need for a full DH! I moved from a Demo 8 to a Commencal Furious, my riding mate has moved to a Bottlerocket, 5-7” seems spot on to me for DH and FR mix. My furious has 7″ travel but single crown forks so it can cope with tight tech terrain (the best of both worlds imho)
Anyhow, if you would go 2nd hand you can easily get a Demo 8 around 1k, 224 for about £1400, Mini DH (Commencal)under 1k, you could pretty much get anything for your budget.