I intend to use the HW with Electrum and MyMonero/Moneroju.
MyMonero is not compatible with hardware wallets, as far as I am aware. For a desktop wallet you can use with a hardware wallet, you'll need to use the official Monero GUI wallet:
https://www.getmonero.org/downloads/#windowsMoneroJu supports Ledger devices.
Yeah, looks like I've missed the promo sale.
Ledger frequently email out discount codes to previous customers to share with their friends, usually in the region of around 10-20%. You can usually find people handing out spare codes on the Ledger subreddit -
https://www.reddit.com/r/ledgerwallet/.
Alternatively, if you can wait a couple of months, the last two years Ledger have had a Black Friday sale. Last year it was 30% off, the year before that 50% off.