Question On Connecting Multiple Sources to TV, DAC, and Power Amp

I'll try and keep this simple and hope I explain myself sufficiently.

We have:

1. Fiber Optic going to the TV Box then out via HDMI to the TV HDMI 1.

2. Apple TV HDMI to TV HDMI2.

I want to connect a Blue Ray DVD/CD Player to HDMI3 on the TV.

The TV Audio Out is TOSLINK type Optical to a Bose System.

I also have a Kenwood KD500 Turntable going to a Kenwood C1 preamp then to the power amp and separate speakers. I'd also like to add an FM Tuner.

I'd like to eliminate the Bose and use one Audio Amp and a pair of speakers.

I have a Pro-Ject Pre Box S2 Digital with USB, Coax, and Optical (toslink style) inputs and RCA Audio outputs that I'd like to feed the TV to.

I don't want to feed the Pro-Ject DAC/Preamp to the C1 preamp but the power amp has only 1 set of inputs.

Should I get a manual A/B switch to select either preamp to feed the power amp or is there a better solution?

Thanks!