I've been flying Airtronics radios since I started flying 14 years ago. IMHO the RDS 8000 is one of the best bargains in radios today. It's rock solid and will do well for most of what you want to fly. The only disadvantages are the 3 character display (which you already mentioned) and no expo or dual rate on the rudder. However, lack of dual rate and expo on the rudder is usually minor for most people. At this level, or for most sport flyers, this just isn't an issue. It's a great radio and you'll do well with it. Airtronics also has a 6 and 7 channel receiver out now that will work with this radio.
You can read my review of this radio here:
<p style="MARGIN: 5pt 0pt; mso-pagination: none; mso-layout-grid-align: none" class="MsoNormal"><font size="3" color="#000000" face="Times New Roman"><span style="FONT-SIZE: 12pt; COLOR: black">Read the full review/article loading with pictures
http://www.rcuniverse.com/magazine/a...article_id=995
Ken</span></font></p>