The receiver is designed to work with speakers of 6-8 ohms so you can't use speakers below 6 ohms. The power is rated at about 100 watts into 6 ohm speakers which would be less into 8 ohms (maybe 75-80 watts).
Can't make any specific suggestions without knowing
1. Price range?
2. What speakers are available in your country?
3. Size of the room?
4. Speaker placement requirements?