Unfortunately, the answer is dependent on other equipment in your room, specifically fluorescent lighting, and the level of interference you need to suppress bears directly on the price you will need to pay.
There are multiple options available:
1) external IR receiver connecting to the 3.5mm jack in the AVR (possibly through a distributor hub). I'm using a Sonance receiver for this. The Sonance was quite expensive, but is very good in adverse (fluorescent) lighting conditions.
2) external IR receiver connecting to a distributor hub and thence to IR blasters taped over the AVR's IR (or in some cases, placed in close proximity). Like 1) you still need line of sight to the IR receiver, which is cabled to the AVR, but it can be used with devices without a 3.5mm Remote in. The
Marmitek Invisible Control is a popular solution, but may be inadequate in adverse lighting conditions.
3) infrared repeater (IR in / out). The repeater needs line of sight to you and to the AVR. These are therefore not all that popular, RF links being superior but no more expensive.
4) RF receiver (IR -> RF) + emitter (RF -> IR). These have the advantage of not needing any line of sight between the receiver and emitter. The
Marmitek PowerMid XL is a popular solution, but may be inadequate in adverse lighting conditions.