I did my whole system that way.
Intent was to use the spark we were useing at the time and he had said yeah no problem $500.
When he arrived to see 28 panels he said that will be $2K and I told him to p!ss off.
The system was ready to run!
I found another spark through the guy who wholesaled me the panels and handed over the $500.
"couldnt have done it better myself"
"why did you use such heavy cable everywhere?" -I've done the math! extra cost in cable repayed in months
(however the dufus at bunnings did not realise the 6.0mm cable he was selling me at 2.5mm price anyway, so I did alright there too)
DOH -there is a thought, I'll have to upgrade that when I go to 10 panels per string as cable voltage rating is 450V. Ahh, 10m of cable wont break the bank!
I cant help but think the QSE250's on ebay for peanuts (including freight) would be a reasonable choice given NU energy has installed 10's of thousands of them.
CMS is now selling direct to the public and a CMS 2000 is under $1500, and given it will outperform an Aurora every day of the week pretty good value. (based on the fact the Aurora gets too hot running at full load and derates itself -I tried one when I had issues with one of the CMS units and it was down 5KW /day which was worse than the faulty CMS

)
EM will be soon supplying a whole new range of SMA Sunnyboys so looking forward to that,
Quality Manufacturers in the 1.5-2KW inverter range is somewhat lacking at present -my opinion
kind of pot luck.