TI Snow Automation/Note Information Latency?

[V-Jolt]

I am really hoping to buy a Virus TI Snow soon. I have an Alesis Micron and I want to replace it with a hardware synth that could actually handle information from my DAW (Ableton Suite 9). For example, smooth automation of several parameters at once as well as note information and physical knob tweaks all ideally at the same time. If I try to automate the levels of OSC 1, 2, and 3 on my Alesis Micron (via the Retroware AU), the latency at any buffer size is ridiculously slow. It takes several seconds after you hit stop to actually stop playing the notes and automating the parameters. I am running a Macbook (an old white one) with Lion 10.7.2, 2.4GHz Intel Core 2 Duo, and 4GB 667MHz DDR2 SDRAM. It seems to handle multitasking with my other synths, Ableton 9, plug-ins, firewire connection to my mixer, and midi controllers just fine but the Alesis Micron, when plugged in alone can't seem to handle notes along with 2 or more parameters at all without being really slow. Is it my computer or the synth?

I must know before buying a Virus TI Snow, if it's up to the task, with little to no latency.