Start by identifying which room and which fixture actually matters most for this project, since that determines which tier is worth spending on. A guest bathroom rarely needs premium fittings, but a master bathroom’s centrepiece basin or faucet is exactly where the jump to a higher tier becomes genuinely visible and worthwhile.
If you’re renovating a full bathroom rather than replacing one fixture, remember that mixing tiers deliberately is standard practice, not a compromise — premium sanitaryware paired with mid-range fittings, or a statement premium faucet against otherwise budget-tier sanitaryware, both work well when the choice is intentional rather than accidental.