Help. System sounds thin and bright or harsh

Seems to me more and more the 30.1's are just not big enough. Room treatments and less speaker toe in will likely help but not fix the sound. 

Earthbound     I am seriously considering subs but a pair of rel s510's would be pretty pricey.  The rel website configured that a pair of t7x's would work based on limited data punched into it's questionnaire,,,speaker brand...model...room square footage and such. I have read threads saying its very hard to integrate subs  but also others praising the use of subs.  I already believe two is the proper way to go to. 

I'm waiting for a new cd transport to arrive to see what that might offer. (probably not the magic bullet but the new one should be better than the Oppo bdp 105.)

vrao 81     I have a couple of after market power cords including one for the cd player acting as a transport (puritain along with the Puritain 156 conditioner) The others probably aren't high end. 

pointtrucking      I THINK its phase correct as some recordings sound very good.

I own 30.2's with a Class A amp. My suggestion is a combination of the above. Place the speakers closer to the walls if possible. Use Ton-Trager or similar stands, or what I did was put springs under my speakers, made a huge positive difference, and get a sub. Even a small one, or two, will do it.

I think good quality wire is worth it, but it should not be used as a tone control. Do the above first before switching wire.

You could get a pair of SVS 3000 Micro subs for $1700. They have an app for setup and allow phase adjustment from 0-180, rather than REL’s 0 or 180. I’ve found that alone allows for better fine tuning. REL not having an app makes setup frustrating as your constantly getting up to turn dials on the back.

I would also trying using the Sumiko setup. It sounds unusual in that your speakers often times don't end up symmetrical but it's all about placing the speakers to your ears and room as no 2 are alike. See here. It's free and you may learn something about placement while doing it. This is how my dealer sets up all his speakers and the only way I do it now.

Update

New cd transport (Project RS2T) has killed most of the bugaboos for harsh sound. I am now on the right path without even doing room treatments. .Oppo bdp105 was just lean and bright in comparison.  Clean power, stereo subs (recommended by many here, thank you) and room treatments (also recommended here) are next and not necessarily in that order.   Clearly bits are NOT just bits...the transport into a decent dac is a game changer in my system/room.  Thanks all for all the help.