I'd try to find a used l3/l3+ at a good price and buy that, they seem to be much more stable and alot of the new coins use scrypt so its very good for speculative mining, if thats not a possibilty i would buy a new gpu rig but only if i can find gpus for the regular prices, over priced gpus are not good investment.
Im actually considering ASICs too but aside from Litecoin, may i ask what Scrypt coins you do speculative mining on? Im asking because, why an L3/L3+?
Using the latest profitability calculators, it seems that the D3 (x11 algo) and Dash mining is way more profitable.