(hey 1st post)
A .info can rank highly on the 1st pg of Google and depending upon the SOC (strength of competition) can even outrank all others (being a .com/.net/.org doesn't guarantee a high or even 1st pg position!), with great content and a few well-placed strong backlinks your .info could be in the top 3 and could even be #1 if your seo etc was better than all others.
A TLD would always be your best choice with regard to value and trust (some people don't even bother or trust other extensions), the order of value is .com / .net / .org those are the top level domains, next would be .info and then .biz.
After those I'd probably go with a hyphen.com (tho I wouldn't unless HAD to) and next, going further down the value chain, .us and maybe .co (honestly, today I don't even know where the .COs fall, they were fairly popular b4 but probably are around .biz nowadays) a hyphen.net or .org wouldn't even be worth it if you have that kind of demand for that KW from your competition, elsen' you'd probably have to work your butt off trying to outrank them.
The .com you have (the plural version of KW) would still rank for your target keyword with the normal SEO targeting of that main KW.
If you are keeping the site for yourself it would likely behoove you to go with the .info, if you will be looking to sell the domain at some time in the future based off its success, you may want to go with the .com simply because the .com is the #1 coveted domain and some people won't even consider a .info.
With all things being equal and you got either site to rank highly on Google your .com domain (even though it's plural) would still likely attract more buyers than the .info.
Google looks at much more than EMD these days and if your site is strong, SEO wise, your plural version will still rank for that main KW because it is within your domain - and actually is only off by the one letter- so you will be in good shape.
Conclusion, if keeping for yourself probably go with the EMD.info, if plans to build up and sell likely the plural version .com would be best.
Hope it helps