I would settle for a version 8 Navcore, 8.562 or 8.417. They have support for TTS, IQ, advanced lane guide and the lot.
If you grab the UK-ROI 845.2645 map you get ALG.
For Texttospeech use Vocalizer which is less heavy than Loquendo and does need no patching.
Bootloader does not need updating.