To be honest, that lighting isnt great, and at only 6,500k, whilst it may be better than some, it wont be great, especially without a reflector (i know that interpet dont make them, so it would need to be DIY)
I think you probably could have some zoanthids in there, and mushrooms, but as far as other soft corals go, i dont know (leathers etc).
One thing you can do though, in the tank with less lighting is go for some macro algea (Caulerpa genus)...
There are loads of differant species available, some with bright colours, and their inexpensive. Search Caulerpa on ebay UK, and youll see some of the species available. Also, they help keep nitrate levels down, and cost nothing compared to corals....And, if you wanted to, you could get a seccond hand metal halide unit off ebay, seccond hand, for about £80-120, or a seccond hand over tank T5 unit for about £40, so its not too much. But then, if you have better lights, then youll want nicer corals, and then with LPS' etc it gets more expensive...
Im sure you would be fine with a pair of clowns in that size tank, one of the top marine sites reccomends only 7g for one, and 10 for a pair, allthough i personally think 12g for a pair would be better...
About the shrimp, id personally stay away from the blood shrimp, allthough IMO the yare the best looking of all the available shrimps, they are apparently quite shy, and dont come out too much, but thats just what ive heard/read...
Mikey