You will probably open the floodgates with such a request. On this forum, EQ is generally frowned upon. Personally, I don't really get it. The general consensus is that you want no processing or EQ whatsoever.
My opinion is that at home I am the DJ and therefore I use my judgement to make the music sound the best and the way I like it, not necessarily how the original sound mixer liked it. Also, it seems to me that equalizers are almost a thing of the past, you rarely see them in home theaters or cars any more.
On my older stereo system, for music only, I use an AudioSource. It is not audiophile by any means. It does, however fit your request for "decent equalizer and not too expensive". It does the job and has pretty good build quality. I bought it new probably 10yrs ago at Radio Shack for $100. I see them on Amazon, but the new one is about 2x what I would pay for it.
Amazon.com: AudioSource EQ200 10-Band Stereo Graphic Equalizer: Electronics
I'm sure you can find one on Ebay. It may also be worth looking for a used Technics. Probably dirt cheap.